A boat manufacturer, Boeweb, produces sailboats (_s) and motorboats (_m). The total amount of dry dock and boat assembly hours available are limited to 3000 units and 9600 hours, respectively. Each sailboat requires 600 assembly hours and 300 units of dry dock, and each motorboat requires 1,200 assembly hours and 300 units of dry dock. If sailboats profit contribution is $2,700 each and motorboats profit contribution is $3,600 each, solve Boeweb's profit maximization problem as a linear program by using (a) the graphical procedure and (b) by using Excel. Select the Sensitivity Report in Solver to compute the shadow values of the constraints.